package com.hzhc.utils;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import cn.hutool.core.util.StrUtil;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

/**
 * @program: cxportsys
 * @description: easypoiExcel工具类
 * @author: wxk
 * @create: 2020-06-22 10:35
 **/
public class EasypoiExcelUtils {

	/**
	 * 功能描述：复杂导出Excel，包括文件名以及表名。创建表头
	 *
	 * @param list           导出的实体类
	 * @param title          表头名称
	 * @param sheetName      sheet表名
	 * @param pojoClass      映射的实体类
	 * @param isCreateHeader 是否创建表头
	 * @param fileName
	 * @param response
	 * @return
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			boolean isCreateHeader, HttpServletResponse response) {
		ExportParams exportParams = new ExportParams(title, sheetName);
		exportParams.setCreateHeadRows(isCreateHeader);
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * 功能描述：默认导出方法
	 *
	 * @param list         导出的实体集合
	 * @param fileName     导出的文件名
	 * @param pojoClass    pojo实体
	 * @param exportParams ExportParams封装实体
	 * @param response
	 * @return
	 */
	private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
			ExportParams exportParams) {
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		if (workbook != null) {
			downLoadExcel(fileName, response, workbook);
		}
	}

	/**
	 * 功能描述：Excel导出
	 *
	 * @param fileName 文件名称
	 * @param response
	 * @param workbook Excel对象
	 * @return
	 */
	private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
			workbook.write(response.getOutputStream());
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 功能描述：默认导出方法
	 *
	 * @author 李家威
	 * @date 2018/7/23 15:33
	 * @param list     导出的实体集合
	 * @param fileName 导出的文件名
	 * @param response
	 * @return
	 */
	@SuppressWarnings("unused")
	private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
		Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
		if (workbook != null)
			;
		downLoadExcel(fileName, response, workbook);
	}

	/**
	 * excel 导入
	 *
	 * @param filePath   excel文件路径
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param pojoClass  pojo类型
	 * @param            <T>
	 * @return
	 */
	public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass)
			throws IOException {
		if (StrUtil.isBlank(filePath)) {
			return null;
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		params.setNeedSave(true);
		params.setSaveUrl("/excel/");
		try {
			return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new IOException("模板不能为空");
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * excel 导入
	 *
	 * @param file       上传的文件
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param needVerfiy 是否检验excel内容
	 * @param pojoClass  pojo类型
	 * @param            <T>
	 * @return
	 */
	/**
	 * 功能描述：根据接收的Excel文件来导入Excel,并封装成实体类
	 *
	 * @param file       上传的文件
	 * @param titleRows  表标题的行数
	 * @param headerRows 表头行数
	 * @param pojoClass  Excel实体类
	 * @return
	 */
	public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows,
			Class<T> pojoClass) {
		if (file == null) {
			return null;
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		params.setNeedSave(true);
		//macos系统保存路径配置本地路径
		if(SystemOnSelectUtil.isMac()){
			params.setSaveUrl("/Users/wuxiaoke/excel/");
		}else{
			params.setSaveUrl("/excel/");
		}
		List<T> list = null;
		try {
			list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new RuntimeException("excel文件不能为空");
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());

		}
		return list;
	}

	/**
	 * excel 导入
	 *
	 * @param file       上传的文件
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param needVerfiy 是否检验excel内容
	 * @param pojoClass  pojo类型
	 * @param            <T>
	 * @return
	 */
	/**
	 * 功能描述：根据接收的Excel文件来导入Excel,并封装成实体类
	 *
	 * @param file       上传的文件
	 * @param pojoClass  Excel实体类
	 * @return
	 */
	public static <T> List<T> importExcel(File file,ImportParams params,
										  Class<T> pojoClass) {
		if (file == null) {
			return null;
		}
		params.setNeedSave(true);
//		params.setSaveUrl("/Users/wuxiaoke/excel/");
		params.setSaveUrl("/excel/");
		List<T> list = null;
		try {
			list = ExcelImportUtil.importExcel(file, pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new RuntimeException("excel文件不能为空");
		} catch (Exception e) {
			throw new RuntimeException(e.getMessage());

		}
		return list;
	}


	/**
	 * export导出请求头设置
	 *
	 * @param response
	 * @param workbook
	 * @param fileName
	 * @throws Exception
	 */
	public static void export(HttpServletRequest request, HttpServletResponse response, Workbook workbook, String fileName) throws Exception {
//		response.reset();
//		response.setContentType("application/x-msdownload");
//		response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode(fileName + ".xlsx", "UTF-8"));
		response.setContentType("application/octet-stream");
		String userAgent = request.getHeader("User-Agent").toLowerCase();
		if (userAgent.indexOf("msie") != -1) {
			response.addHeader("Content-Disposition",
					"attachment;filename=" + URLEncoder.encode(fileName + ".xlsx", "UTF8"));
		} else {
			response.addHeader("Content-Disposition",
					"attachment;filename=" + new String((fileName + ".xlsx").getBytes("UTF-8"), "ISO-8859-1"));
		}
		response.setHeader("filename",fileName);
		ServletOutputStream outStream = null;
		try {
			outStream = response.getOutputStream();
			workbook.write(outStream);
			outStream.flush();
			outStream.close();
			response.flushBuffer();
		} finally {
			outStream.close();
		}
	}

	/**
	 * export导出请求头设置
	 *
	 * @param response
	 * @param workbook
	 * @param fileName
	 * @throws Exception
	 */
	public static void export(HttpServletResponse response, Workbook workbook, String fileName) throws Exception {
		response.reset();
		response.setContentType("application/x-msdownload");
		response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode(fileName + ".xlsx", "UTF-8"));
		ServletOutputStream outStream = null;
		try {
			outStream = response.getOutputStream();
			workbook.write(outStream);
		} finally {
			outStream.close();
		}
	}

	/*
	 * public static void main(String[] args) { String fileName =
	 * "C:\\Users\\shock\\Desktop\\配载清单.xlsx"; try { List<CbpzExcelVo> cbpzExcelVos
	 * = importExcel(fileName, 1, 1, CbpzExcelVo.class);
	 * System.out.println("josn====" + JSONUtil.parse(cbpzExcelVos).toString()); }
	 * catch (Exception e) { e.printStackTrace(); }
	 *
	 * }
	 */
}
